エイドステーション1、大山千枚田
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大山千枚田は、鴨川の中山間に位置し房総半島のほぼ真ん中にあり、嶺岡の山並みのふもと、面積約4ヘクタールの急傾斜地に、階段のように連なる大小375枚の田んぼ群から構成されています。千葉県指定名勝の「鴨川大山千枚田」と、周辺の里山と集落の姿は、自然と人々の営みが育んできた、貴重な文化的景観です。 
大山千枚田は日本で唯一雨水のみで耕作を行っている天水田です。そのような場所では動植物も貴重なものが多く生息しています。いま盛んにいわれている生物多様性の宝庫なのです。さらに棚田は、多面的機能を持っていて、これを守ることが洪水などの災害を防止したり、貴重な生態系や環境の保全になります。テラスからの美しい景観も楽しんでください。

Le risaie a terrazzo di Oyama-Senmaida (大山千枚田) si trovano al centro della penisola di Boso, lungo la catena dei monti Mineoka. Le 375 risaie si estendono su una superficie di 4 ettari. Questa zona, che comprende alcune antiche abitazioni, e' stata nominata "patrimonio culturale paesaggistico" dalla prefettura di Chiba e preservano la bellezza del sistema tradizionale di coltivazione del riso che stava scomparendo dagli anni 1970.
Le risaie di Oyama-Senmaida sono le uniche in tutto il Giappone ad essere irrigate con acqua piovana, creando un ecosistema unico e particolare. Il panorama che si gode dalla veranda del centro accoglienza e' spettacolare.

Terraced Rice Paddies of Oyama Senmaida.
The cultivation of the hillsides of mountain regions was a common sight throughout Japan, including Kamogawa, until the late 1970s. However, due to the increase in the use of machinery and an aging population of farmers, this landscape is rapidly disappearing.
Within Kamogawa, the terraced rice paddies of Oyama Senmaida continue to be carefully maintained and cultivated to this day. The puzzle piece-like fields of the Oyama Senmaida fitting together to create curvy steps up the mountainside, are the very image of Japanese farming villages. Oyama Senmaida was recognized in 2002 as a “cultural landscape,” created mutually by people and nature, when it was designated by Chiba Prefecture as a Prefectural Landmark. Currently, the Oyama Senmaida are being maintained by the “owner system,” which works to contribute toward local revitalization by helping preserve this beautiful landscape and providing a place for urban dwellers to try their hand at farming.